3 years ago

Can I get some help on this please

Mathematics

1 answer:

SVEN [57.7K]3 years ago

8 0

6a. y=-8(x-10)²
6b. y=(.15)(x+6)²

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Complete the square<br> x²-8x-65=0

FromTheMoon [43]

x=-5 and x=13

Step-by-step explanation:

Given equation is:

$x^2-8x-65=0$

Adding 65 to both sides

$x^2-8x-65+65=0+65\\x^2-8x=65$

Now to decide what to add

$8x = 2ab\\8x=2.x.b\\\frac{8x}{2x} = b\\b=4$

So we will add (4)^2 to both sides

$x^2-8x+(4)^2=65+(4)^2\\Using\ formula: (a^2-2ab+b^2)=(a-b)^2\\(x-4)^2=65+16\\(x-4)^2=81Taking\ square\ root\ on\ both\ sides\\\sqrt{(x-4)^2}=\sqrt{81}\\x-4=-9\ \ \ \ and\ x-4=9\\x=-9+4\ \ \ \ and\ \ \ x=9+4\\x=-5,\ x=13$

So the solution is:

x=-5 and x=13

Keywords: Completing Square, Variables

Learn more about quadratic equations at:

#LearnwithBrainly

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4 years ago

What percent of 45 is 18

alexira [117]

4% of 45 equals 18.

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4 years ago

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Evaluate: g(4):g(x) = 8x2 + 9x - 7

Elden [556K]

Answer:

g(4) = 157

Step-by-step explanation:

g(x) = 8x^2 + 9x - 7

Let x =4

g(4) = 8 * 4^2 +9*4 -7

=8*16 +36 - 7

=128+36-7

=157

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3 years ago

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Please! can someone help me with this?

lys-0071 [83]

5 inspections in 4 hours

Hope this helps! Please make me the brainliest, it’s not necessary but appreciated, I put a lot of effort and research into my answers. Have a good day, stay safe and stay healthy.

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Find the value of x to the nearest tenth. CHECK THE ATTACHMENT

lukranit [14]

2929293939393939494. merry iwie i

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